Electricity in any modern household is directed to wall sockets. What many people do not know, is that the current is then subdivided at each socket. Using both plugs in a dual socket means each device gets half the power, and using a power block decreases the individual output still further.
In some cases (such as charging a battery) this leads to longer charging times. However, by plugging the most power-hungry appliances into the same socket, it is possible to save on electricity.
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